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LY404039 is a potent and highly selective agonist of recombinant human mGlu2 and mGlu3 receptors and rat neurons expressing native mGlu2/3 receptor with Ki values of 149, 92 and 88 nM, respectively [1].

The inhibition of forskolin-stimulated cAMP formation has indicated that LY404039 was a nanomolar potent agonist of human mGlu2 (EC50 = 23 nM) and mGlu3 (EC50 = 48 nM) receptors. Additionally, LY404039 could concentration-dependently decrease Excitatory Postsynaptic Potentials (EPSPs) in rat striatal spiny neuron (EC50 = 141 nM). LY404039 has also been reported to suppress the frequency of 5-HT-induced Postsynaptic Currents (EC50 = 82.3 nM) in rat prefrontal cortical slices [1].

References:

[1] Rorick-Kehn LM1, Johnson BG, Burkey JL, Wright RA, Calligaro DO, Marek GJ, Nisenbaum ES, Catlow JT, Kingston AE, Giera DD, Herin MF, Monn JA,McKinzie DL, Schoepp DD. Pharmacological and pharmacokinetic properties of a structurally novel, potent, and selective metabotropic glutamate 2/3 receptor agonist: in vitro characterization of agonist (-)-(1R,4S,5S,6S)-4-amino-2-sulfonylbicyclo[3.1.0]-hexane-4,6-dicarboxylic acid (LY404039). J Pharmacol Exp Ther. 2007 Apr;321(1):308-17. Epub 2007 Jan 4. J Pharmacol Exp Ther. 2007 Apr;321(1):308-17. Epub 2007 Jan 4.

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